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Potential SharpRDP Behavior
editPotential SharpRDP Behavior
editIdentifies potential behavior of SharpRDP, which is a tool that can be used to perform authenticated command execution against a remote target via Remote Desktop Protocol (RDP) for the purposes of lateral movement.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
Severity: high
Risk score: 73
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Lateral Movement
Version: 101 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Rule query
edit/* Incoming RDP followed by a new RunMRU string value set to cmd, powershell, taskmgr or tsclient, followed by process execution within 1m */ sequence by host.id with maxspan=1m [network where event.type == "start" and process.name : "svchost.exe" and destination.port == 3389 and network.direction : ("incoming", "ingress") and network.transport == "tcp" and source.ip != "127.0.0.1" and source.ip != "::1" ] [registry where process.name : "explorer.exe" and registry.path : ("HKEY_USERS\\*\\Software\\Micro soft\\Windows\\CurrentVersion\\Explorer\\RunMRU\\*") and registry.data.strings : ("cmd.exe*", "powershell.exe*", "taskmgr*", "\\\\tsclient\\*.exe\\*") ] [process where event.type == "start" and (process.parent.name : ("cmd.exe", "powershell.exe", "taskmgr.exe") or process.args : ("\\\\tsclient\\*.exe")) and not process.name : "conhost.exe" ]
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Lateral Movement
- ID: TA0008
- Reference URL: https://attack.mitre.org/tactics/TA0008/
-
Technique:
- Name: Remote Services
- ID: T1021
- Reference URL: https://attack.mitre.org/techniques/T1021/
Rule version history
edit- Version 101 (8.5.0 release)
-
-
Updated query, changed from:
/* Incoming RDP followed by a new RunMRU string value set to cmd, powershell, taskmgr or tsclient, followed by process execution within 1m */ sequence by host.id with maxspan=1m [network where event.type == "start" and process.name : "svchost.exe" and destination.port == 3389 and network.direction : ("incoming", "ingress") and network.transport == "tcp" and source.ip != "127.0.0.1" and source.ip != "::1" ] [registry where process.name : "explorer.exe" and registry.path : ("HKEY_USERS\\*\\Software\\Micr osoft\\Windows\\CurrentVersion\\Explorer\\RunMRU\\*") and registry.data.strings : ("cmd.exe*", "powershell.exe*", "taskmgr*", "\\\\tsclient\\*.exe\\*") ] [process where event.type in ("start", "process_started") and (process.parent.name : ("cmd.exe", "powershell.exe", "taskmgr.exe") or process.args : ("\\\\tsclient\\*.exe")) and not process.name : "conhost.exe" ]
-
- Version 7 (8.4.0 release)
-
- Formatting only
- Version 6 (8.1.0 release)
-
- Formatting only
- Version 5 (8.0.0 release)
-
-
Updated query, changed from:
/* Incoming RDP followed by a new RunMRU string value set to cmd, powershell, taskmgr or tsclient, followed by process execution within 1m */ sequence by host.id with maxspan=1m [network where event.type == "start" and process.name : "svchost.exe" and destination.port == 3389 and network.direction : ("incoming", "ingress") and network.transport == "tcp" and source.address != "127.0.0.1" and source.address != "::1" ] [registry where process.name : "explorer.exe" and registry.path : ("HKEY_USERS\\*\\Software\\Micr osoft\\Windows\\CurrentVersion\\Explorer\\RunMRU\\*") and registry.data.strings : ("cmd.exe*", "powershell.exe*", "taskmgr*", "\\\\tsclient\\*.exe\\*") ] [process where event.type in ("start", "process_started") and (process.parent.name : ("cmd.exe", "powershell.exe", "taskmgr.exe") or process.args : ("\\\\tsclient\\*.exe")) and not process.name : "conhost.exe" ]
-
- Version 4 (7.16.0 release)
-
-
Updated query, changed from:
/* Incoming RDP followed by a new RunMRU string value set to cmd, powershell, taskmgr or tsclient, followed by process execution within 1m */ sequence by host.id with maxspan=1m [network where event.type == "start" and process.name : "svchost.exe" and destination.port == 3389 and network.direction == "incoming" and network.transport == "tcp" and source.address != "127.0.0.1" and source.address != "::1" ] [registry where process.name : "explorer.exe" and registry.path : ("HKEY_USERS\\*\\Software\\Microsoft\\Windows\\Current Version\\Explorer\\RunMRU\\*") and registry.data.strings : ("cmd.exe*", "powershell.exe*", "taskmgr*", "\\\\tsclient\\*.exe\\*") ] [process where event.type in ("start", "process_started") and (process.parent.name : ("cmd.exe", "powershell.exe", "taskmgr.exe") or process.args : ("\\\\tsclient\\*.exe")) and not process.name : "conhost.exe" ]
-
- Version 2 (7.12.0 release)
-
- Formatting only